Energy work power

Question 1

energy

Answer 1

ability of a physical object/ system to cause change

energy can be transferred from one object to another or transformed/converted between various forms

Question 2

types of energy

Answer 2

KE (determined by movement) - rotation, thermal, sound
PE (determined by how much an object could move) - gravitational, elastic, magnetism

Question 3

law of consevation of energy,

Answer 3

in a transfer, trasnformation or conversion of energy, the energy is always conserved

Question 4

work

Answer 4

energy transfered to an object by applying a force parrallel to its displacement

W = Fs

Question 5

power

Answer 5

measured in watts, and is the rate of work being done

Question 6

elastic collision

Answer 6

when total KE is conserved and none is lost to heat, sound, deformation etc.

impossible on a macroscopic level but some questions may get u to assume elastic coliisioni

Question 7

inelastic collisions

Answer 7

total energy is conserved but some KE is converedt to different forms like heat sound or deformation

Question 8

perfectly inelastic collision

Answer 8

two objects stay together after impact and the total KE of the system decreases even if no KE is converted to other forms

but momentum is always conserved